Variable-speed apparatus.



E; G. MARBLE.

VAEIABLE SPEED APPARATUS.

APPLICATION FILED DEG.13.1908.

Patented Nov. 2, 1909.

2 SHEETSSHEET 1.

C i/ari/e E. C. MARBLE.

VARIABLE smn mamas.

' APPLIOATIOS FILED DBO. 12,1908.

938 679 V Patented Nov. 2, 1909.

2 SHEETS-SHEET 2. I

EUGENE C. MARBLE. OF CHICAGO, ILLINOIS.

VA RIALLE-SP EED APPARA TUS;

' Application filed December To all i-t'lwm may rower:

lie-it known. that l. l'it' l-LXl-l )LunsLE. a v t'llliitll of the luiteil tdtt-s. residing at (hiangular for the ma or portion at the ltl lgill, raginin lllfit'fillltt) of (owl-1 and State of llliand t'tttl'ttl to the hub h v means of bolt or unis, have iznr-utiwl rennin new and izsrl'nl I ilnpr wmrnts in a v':ii'i:|l ie. 'pvvil .x 'pnrnl and the apparatus is of :i type in \vhirh the lllt'iilln providml to transmit motion to the driven shaft i rotatable ahont. a plurality of axes.

An important. feature of my improvement ronsi-sts in friction means to retard or prevent rotation of the means to transmit mu- 1 .ilrnwings, and pnrticulariy pointrd out in the 't-laiizis hereunto appended.

h lt-s ihins: the ihieiitiou in detail, reference is had to the accompanying drawings forming'a part of this specification. wherein like refer-sore characters indicate corresponding parts throughimt the several views, in \vh':Ch--- Figure l is a longitudinal central section of the assemhirii parts of the variable speed ammratus. l 2 is a perspec ive view of tho mime. Fig. 3 is a cross section on line 3-3 of Fig. 1. Fig-f. 4 is a section on line 4;-l.of Fig. 3 Fig. 5 is a perspective view of above: pinion and irit-tionsnrtare. Fig. 6 is n'pserspet-tivn view .of a cinnpanion friction surface, partly broken in way to disclose the. link attachment.

One embodiment ofrmy invention is described as follows:

Referring to the dlmviugs by reference numerals, 8 designates the drive .sha ft, 9 its bevel .genr wheel keyed at. 10, and 11 denotes the teeth of the gear .wheel 9. The driven shaft,.- 12, carries bevel gear wheel 13, keyed.-

at. 14- The gear wheel teeth 15 are adapted to mesh with intermediate motion transmittin means which will be further described.

. or the p :rpose of rotation about what is Spcriticatton of Letters iatent.

, termed a seuomlary ;i.: there is provided Patented Nov. 2. i 909.

Serial No. 467,276.

:1 huh. lt having spokes 1T. prufc-rallly rec- =0? the pohe is disposed in hearing plate,

mentioned. The friction IS termed a shirt,

3?, hereinafter momhur, 13 of pnnon and its companion friction member, 34, is termed a plug. The two parts, the skirtand the plug, preferably are in the gig-ueral form of a 'frustum of a cone. The position of the parts may he changed if desired, and the plug may be integral wither attached to the gear pinion and the skirt may be slidably mounted on the spoke. An important function of thesefriction members is to retard and when desired prevent the rotation of the bevel pinion on its primary axis. The part, 24-, has a sleeve portion 9.5 with rectangular opening therethrough, and the bifurcated link fastening. 27. The. ball end, of the link, is seated in a socket in collar, 25), and band, 30, secured by iucans of screw, 31. The collar, 29, is slidable longitudinally on the hub, 16. The strap, 32, is attached to push rod, 33', slidabic in boss, 34. The grooved collar, 35, and strap, 36, with an operating lever (not shown) constitute a part. of the menus for shifting the collar, 35, longitudimilly upon the shaft, 12, for the purpose of producing a corresponding movement of the collar. :39, by means of the rod, 33, and strap, 32. The adjacent. faces of the bearing )lnt, 37,- and the end-0f pinion,

22, are para lel, and-have balls, 38, there- 1 For the purpose of operating the internal brake in the ap aratus, bell crank 41, strap link 42, and'roc 43 to operating lever (not shown) are provided.

For the purpose of retarding and at, will preventing rotation of what is termed the variable speed wheel on its axis, there is provided an external hand brake, 4A, havin a fixed end, 45, a. movable end, 46, attacker to red 47, which is pivotaliy secured to foot lever, 48.

1n operation, normally, when the drive shaft is in motion, gear teeth, 11, and, 15,. 

